HR: 1330h
AN: H12D-1013    [PDF]
TI: MOPEX Workshop Results Revisited
AU: * Leavesley, G H
EM: george@usgs.gov
AF: U.S. Geological Survey, Box 25046, MS 412, DFC, Denver, CO 80225 United States
AB: A complementary program to the Prediction in Ungauged Basins (PUB) program is the Model Parameter Estimation Experiment (MOPEX). The primary goal of MOPEX is to develop techniques for the {\it a priori} estimation of parameters in land surface parameterization schemes in atmospheric models and in hydrologic models. A recent MOPEX workshop evaluated the use of {\it a priori} estimated parameters in eight hydrologic models. A data set of mean areal precipitation, temperature, and potential evapotranspiration was provided for each of 12 basins located predominantly in the southeastern United States. While workshop results provided valuable insight to some problems in {\it a priori} parameter estimation within and among models, additional questions remain. Using additional data sets for the 12 basins, alternative parameter estimation techniques are being evaluated to compare the use of distributed values of precipitation and temperature to the use of mean areal values in the original study. Also, the magnitudes of the uncertainty in streamflow prediction resulting from errors in the meteorological variables and their distribution are being compared with the magnitudes of uncertainty associated with errors in parameter estimates of basin physical characteristics. The U.S Geological Survey's distributed-parameter watershed model PRMS was one of the eight models used in the MOPEX workshop and is the model being used to conduct these further studies. Results of this investigation are presented.
DE: 1818 Evapotranspiration
DE: 1836 Hydrologic budget (1655)
DE: 1854 Precipitation (3354)
DE: 1860 Runoff and streamflow
SC: Hydrology [H]
MN: 2003 Fall Meeting